In case anyone's wondering the current status of this place I had planned a revisit yesterday with
@klempner69 and a non member. We thought it would be a shot in the dark as I hadn't seen anything from here for ages to begin with which usually means something has changed.
Its not locked up, in fact far from it but security has purposely made the only way into the site a trap. There are two holes in the fence close together which look to have been purposely left there, and in between the holes on the road inside the fence are a pair of sensors/cameras which, if you choose to enter the site through said holes will bring you out directly into their path. One of the holes also had dead twigs laced through the chainlink lashed together with cable ties so security would be able to know someone has moved them.
There are also sensors erected at other points on the roads around the site as well, at least two more from what I could see.